Attilio monticolo



N0. 62l,268. Patented Mar. l4, I899.

A. MONTICULU. ROCK PENET A .NG PULLEY FDR CABLE SAWS.

plication filed Aug.

(No Model.)

UNITED STATES i ATTILIO MONTICOLO, OF OARRARA, ITALY.

ROCK-PENETRATING PU LLEY FOR CABLE SAWS.

SPECIFICATION forming part of Letters Patent No. 621 ,268, dated March 14, 1899.

Application filed August 1, 1 898.

To a whom it may concern:

Be it known that I, ATTILIO MONTICOLO, mining engineeiga subject of the King of Italy, and a resident of Oarrara, Italy, have invented a certain new Improvement in Penetrating- Pulleys, (for which I have obtained a patent in Italy, dated March 17, 1898, Reg. Att., Vol. XCII, No. 170,) of which the following is a specification.

The object of this invention is to provide a rock-perforating pulley allowing to do away with the necessity of boring holes of large diameter, which is always very expensive when cable-saws are used. The said pulley is so designed as to penetrate into the rock simultaneously with the cable guided byit, following the cut effected by the cable and widening it slightly by friction, its pivot being contained within a hollow tube or sleeve and be ing moved from the exterior to the interior by an ordinary mine-hole previously made into the rock in any position or direction.

In the annexed drawings, Figure 1 is a front View of the pulley, showing the cable passing on part of its circumference and its shaft. Fig. 2 is a side view of same. Fig. 3 is a sectional view showing a special application of the pulley and cable to the perforation of rock, and Fig. 4. is a plan view of same.

With reference to the above-mentioned figures, A is the pulley or disk, which may be formed of metal or any other suitable resistant material, such as emery or oarborundum or agate or crystal, the periphery of which may be milled or provided with points in order to aid, when necessary, the cable in cutting the Serial No. 687,444. (No model.)

rock and the thickness of which is substantially that of the diameter of the cable.

The pivot a is represented in dotted lines in Fig. 1.

B is the shaft or tubular guiding-rod, of any suitable metal, which is pushed in the direction of the bore and presses downward the pulley and cable against the rock to be out.

It is obvious that the form and arrangement of the various parts may be varied without departing from the gist of my invention, and I desire it to be clearly understood that my invention is not limited to the particular form and arrangement described and illustrated.

I claim- 1. A rock-penetrating pulley for wire-cable saws, consisting of a circumferentiallygrooved disk mounted on a pivot and supportedon a shaft and adaptedto guide the cutin a rock, substantially as and for the purposes set forth.

2. As an improved article of manufacture, a rock-penetrating pulley formed by a disk grooved circumferentially and extending within a slotin the end of its supporting-shaft within which it is pivoted to revolve whereby the pulley serves as a guide for the wire and drilling of a Well in the rock is obviated, substantially as specified.

In witness whereof I have hereunto set my signature in the presence of two witnesses.

ATTILIO MONTICOLO. Witnesses: I MATH. FELIoE, OAMILLO GIRoNIARI.

ting-cable acting with an abrading substance 

